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Based on the American West Coast Lumber Inspection Bureau (WCLIB) grading rules, [6] there is only one grade of stud: STUD. A stud is graded for vertical application and its stress requirements and allowable visual defects reflect that application. A stud is most similar to a #2 grade, which is held to a higher standard during grading.
As such, CLS is widely utilised as a general standard for timber suitable for wall studs, DIY and other construction projects, including housebuilding. [1] [4] [7] It is very commonly employed in conventional timber frames for roofs, lofts and attics. [8] It is typically used in the UK for timber wall studs. [9]
Studs usually consist of 1 + 1 ⁄ 2-by-3 + 1 ⁄ 2-inch (38 mm × 89 mm) or 1 + 1 ⁄ 2-by-5 + 1 ⁄ 2-inch (38 mm × 140 mm) lumber and are commonly spaced at 16 inches (410 mm) on center. This spacing may be changed to 12 or 24 inches (300 or 610 mm) on center depending on the load and the limitations imposed by the type and thickness of the ...
A standard or standard hundred was a measure of timber used in trade. [ 1 ] [ 2 ] The measure varied in number, size and composition from country to country so the term is usually preceded by the region or port of origin. [ 2 ]
The Central Committee on Lumber Standards was started in 1922 by Herbert Hoover when he was U.S. Secretary of Commerce at the request of the lumber industry. [4] Chaired by John W. Blodgett, the Central Committee was intended to be a way to create voluntary lumber standards without imposing formal government regulations, in order to solve the problem of lumber manufacturers selling lumber that ...
As previously noted, less wood is needed to produce a given finished size than when standards called for the green lumber to be the full nominal dimension. However, even the dimensions for finished lumber of a given nominal size have changed over time. In 1910, a typical finished 1-inch (25 mm) board was 13 ⁄ 16 in (21 mm). In 1928, that was ...
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DIN 976-1, DIN 976-2: DIN 976-1: Metric thread stud bolts: Active: DIN 976-2: Metric interference-fit thread stud bolts: Active: DIN 977: Hexagon weld nuts with flange: Withdrawn: DIN EN ISO 21670: ISO 21670: DIN 979: Hexagon thin slotted nuts and castle nuts with metric coarse and fine pitch thread – Product grades A and B: Active: DIN 980